My Aqua leaks from the air-hole, the juice feed control seems to do nothing and I haven't filled it yet without getting liquid all over me. It is a clone though, so maybe that explains it.
Are you using the bottom fill method on your Aqua? https://www.youtube.com/watch?v=UiR-tckIXvM
Using this method, I can fill the tank up to its maximum capacity of 3.0 ml and there is zero leaking or flooding of the air chamber. I also ordered the replacement PMMA tank from fasttech and it has helped a LOT.
$1.72 Replacement PMMA Tank for Aqua RBA Atomizer at FastTech - Worldwide Free Shipping